volume 1 - Halifax Regional Municipality

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<strong>Halifax</strong> Water Integrated Resource Plan Integrated Resource Plan Development and Evaluation Baseline and Enhanced Overflow Control Comparison of the plans in Bundles 3 and 4 show a difference of $71 million in the 30- year NPV of costs or about 3.6 % of Plan 15-1 (2.4 % of Plan 25-1). This is associated with the Enhanced Overflow Control Program. As was previously noted, due to the significant uncertainty around both the required level of control and the timing of required implementation this program was allocated to the end of the planning period. Thus, the NPV of the program capital costs are heavily discounted and no O&M costs have been added since they would accrue beyond the end of the planning period. For purposes of further analysis, both the Baseline and the Enhanced Overflow Control Program were carried forward to the intermediate plan analysis. Asset Renewal The Objective 8 asset renewal costs associated with each infrastructure system are presented in Figure 5.4. For each level of asset renewal, the wastewater system costs are dominant. For example, the A level wastewater represents approximately 50% of the total asset renewal effort. The storm sewer systems are relatively new but still require some ongoing investment. The water systems require an intermediate level of expenditure (38% of the total for Level A). Figure 5.4 Objective 8 Asset Renewal Costs by Asset System ($million) For purposes of further detailed analysis of asset renewal requirements the asset renewal variation was brought forward into the intermediate set of IRP plans. Revision: 2012-10-29 Integrated Resource Plan 65 October 31 2012 Page 98 of 272
<strong>Halifax</strong> Water Integrated Resource Plan Integrated Resource Plan Development and Evaluation Additional O&M Costs The additional O&M costs associated with growth (water and wastewater systems) and enhanced compliance (wastewater system only) were estimated as part of the financial modeling. The 30-year NPV costs are presented in Figure 5.5 showing the O&M growth and compliance components. The compliance related costs change by about 41 % from level A to C. This reflects the impact of A and C level timings on the projects. Figure 5.5 Additional O&M Costs Wastewater Compliance Timing The impact of wastewater compliance timing on the 30-Year NPV can be seen in Figure 5.6. The IRP expenditures for A, B and C plans with enhanced overflow control and the RWWFP (Plans 25-1, 28-1, 22-1 respectively) are presented in the figure. The major variation is associated with the implementation timing of the Objective 4 projects: • Upgrade of HHSP facilities to full secondary treatment • Upgrade of 8 WWTFs (excluding BLT which is presently under upgrade) discharging to limited receiving waters for nutrient reduction • Consolidation of flows from the BLT and Springfield Lake WWTFs through recommended RWWFP (not included in this total but included as part of RWWFP in Objective 13). Revision: 2012-10-29 Integrated Resource Plan 66 October 31 2012 Page 99 of 272
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VOLUME 1: INTEGRATED RESOURCE PLAN
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Halifax Water Integrated Resource P
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Capital Expenditure Program All $ i
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Water Projects Page 1 of 4 Project
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Water Projects Page 3 of 4 Project
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October 31 2012 Page 171 of 272
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FINAL 1 2 3 4 5 6 7 10 13 16 17 18
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Recommended Alternative Resource Pl
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Financial Model 40-4 Halifax Water
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Financial Model 40-4 2.512 (O&M) Lo
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Financial Model 40-4 1.028 Cavalier
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Financial Model 40-4 3.511 Stokil (
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Financial Model 40-4 2.075 Beaver C
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Financial Model 40-4 2.848 Storage
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Summary of Capital, Operational and
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Asset Renewal Costs Halifax Water I
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Asset Renewal Costs Stormwater Asse
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Statement Concerning Halifax Water
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Statement Concerning Halifax Water
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volume 1 - Halifax Regional Municipality

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